You are teaching a group of firefighters who are in class to become emergency medical responders. the topic is artificial ventilation with the bag-valve mask (bvm). which one of the following points related to using the bvm should you emphasize?
a. maintaining a good mask-to-face seal is difficult.
b. the bvm is useless unless it is hooked to supplemental oxygen.
c. it is better to ventilate too quickly as opposed to too slowly.
d. the bag must be fully squeezed in order to give a proper amount of volume with each breath.
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